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Re:Appsumo: Lifetime Mixpanel for $17 by NginUS on Tuesday November 23, 2010 @01:26AM (#1932781)
Doesn't seem so bad until the purchase process ends in an error and all that's accomplished is $17 is lost.

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I hope they return my emails & resolve it.

EDIT:

+1 for AppSumo, <30 minutes support reply after midnight on a Monday overnight.